From: Lai Siyao <lai.si...@intel.com> Xattr cached data may be gone, but lock still held, in this case, refetch xattr from server, otherwise client will return error.
Signed-off-by: Lai Siyao <lai.si...@intel.com> Reviewed-on: http://review.whamcloud.com/12952 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3544 Reviewed-by: Bobi Jam <bobi...@hotmail.com> Reviewed-by: Nathaniel Clark <nathaniel.l.cl...@intel.com> Signed-off-by: Oleg Drokin <oleg.dro...@intel.com> --- drivers/staging/lustre/lustre/llite/xattr_cache.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/staging/lustre/lustre/llite/xattr_cache.c b/drivers/staging/lustre/lustre/llite/xattr_cache.c index da190f9..69ea92a 100644 --- a/drivers/staging/lustre/lustre/llite/xattr_cache.c +++ b/drivers/staging/lustre/lustre/llite/xattr_cache.c @@ -295,13 +295,18 @@ static int ll_xattr_find_get_lock(struct inode *inode, mutex_lock(&lli->lli_xattrs_enq_lock); - /* Try matching first. */ - mode = ll_take_md_lock(inode, MDS_INODELOCK_XATTR, &lockh, 0, LCK_PR); - if (mode != 0) { - /* fake oit in mdc_revalidate_lock() manner */ - oit->d.lustre.it_lock_handle = lockh.cookie; - oit->d.lustre.it_lock_mode = mode; - goto out; + /* inode may have been shrunk and recreated, so data is gone, match lock + * only when data exists. */ + if (ll_xattr_cache_valid(lli)) { + /* Try matching first. */ + mode = ll_take_md_lock(inode, MDS_INODELOCK_XATTR, &lockh, 0, + LCK_PR); + if (mode != 0) { + /* fake oit in mdc_revalidate_lock() manner */ + oit->d.lustre.it_lock_handle = lockh.cookie; + oit->d.lustre.it_lock_mode = mode; + goto out; + } } /* Enqueue if the lock isn't cached locally. */ -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
